White Light  (580-630nm)


Glass 2+:  High quality hand selected glass with our exclusive Solar 2+ coating.

RG Solar Film:  .0005 clear Polymer also coated with Solar 2+.

Black Polymer Film:  .002 Polymer with absorptive filtering material spread throughout substrate.


All filters block 99.999% of the energy from entering the instrument. For visual and photographic use.


-  Check the solar filter for any possible damage before each use.

-  The filtering must be FIRST in-line between sun and instrument. Do not use filter behind eyepiece.

-  Secure filter properly. (See mounting instructions)

-  Do not leave instrument unattended where a child or inexperienced adult could point it at the sun with-

   out the filter properly attached. 

-  Keep the finder-scope covered if not equipped with a proper solar filter.

-  Point the instrument away from sun when installing and removing solar filter.

-  Do not place the filter up against a smaller instrument. The end of the tube will damage the filter.

-  When looking through the focusing tube without an eyepiece, there may appear to be small defects in

    the coating that are not seen when observing through the eyepiece. This is normal and is not a coating

   defect or safety concern.

-  "Ghosting" can occur due to internal reflections. If this is a problem, simply tilt the filter slightly.

-  Filter may absorb solar energy and get hot during use. Use extra care when removing.

Pinholes and minor surface scratches are common in solar filters; however, our multi-coating technique keeps them to a minimum. A "bright" pinhole in the coating may cause "ghosting" due to scattered light. If this is seen during observation, the pinhole(s) should be blocked out. Block out any pinholes on inside surface facing telescope. Hold the filter 1-2 feet in front of a 50-100 soft white light bulb. Blocking can be done using a fine point felt marker. There is no danger if a few pinholes or minor scratches are present. The touch-up(s) will not lessen the optical performance. Small pinholes need not be blocked if not causing an image problem.


The inside of the cell will be lined or unlined with felt depending on the size ordered. If your filter is too loose, it can be custom fitted using the extra felt included. Additional felt can be added over any existing felt. Test fit before removing the backing and permanently installing the felt. We cannot exchange for another size if the felt is installed. 


-  Allow instrument and filter to equalize to the outside temperature for at least 15 minutes.

-  If possible, do not view over pavement or buildings. Viewing over grass or water will help avoid heat

   currents that will degrade the image.

-  Cover dark colored instruments with a light colored cloth.


Glass:  Loose dust can be blown off with up to 15 PSI. Clean with Isopropyl (rubbing) alcohol and a soft tissue. Apply generous amounts of alcohol to the tissue and rub lightly across the surface using long strokes. Lightly wipe dry with fresh tissue. Since the coating is on the inside facing the telescope, it will rarely need cleaning if handled carefully and kept sealed when not in use.

RG & Black Polymer Film:  Loose dust can be blown off using up to 15 PSI. We do not recommend wiping film since it can be easily damaged.


Glass 2+ 15 years, RG & Black Polymer 5 years. All filters are covered by a limited liability warranty from defects in material and workmanship. This warranty does not apply if in the judgment of Thousand Oaks Optical, the product fails to be safe due to shipping damage, damage from improper handling or storage, abuse or misuse, or has been used or maintained in a manner not conforming to product's instructions or has been modified in any way.


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